BURKERT Type 8640 modular valve island system is designed to solve diverse and complex control problems due to its systematic modular construction and combination of pneumatic and electrical interfaces. By putting together a row of pneumatic modules with different numbers of valves, 2 to 24 valve functionalities may be realized on one valve unit. Bodies and connection modules are made of high-quality plastic (polyamide) and are easy to assemble by means of the built-in snap connectors.

This specific configuration (SKU 20098517) features a 19 mm width per station, utilizing Type 5470 solenoid valves, with single wiring connections, G 1/4 pressure ports, and is designed for DIN-rail installation.

Solenoid Valve Type 5470 (19 mm Width)

The solenoid valve Type 5470 consists of a pneumatic valve body fitted with a Type 6106 rocker pilot valve. An armature with a tilting bearing, similar to a rocker, tilts within the body of the pilot valve, and switches the valve. The minimal tilting movement of the rocker is non-wearing, and basic lubrication is unnecessary.

General Technical Data (Type 5470)

Product properties	Type 5470
Body Material	PA (polyamide)
Seal Material	NBR
Width per station	19 mm
Manual override	Standard
Number of valve slots	Max. 24
Pressure range	Vac. 2...10 bar (SKU 20098517 rated 2-8 bar)
Flow rate QNn value air	300 l/min measured at +20 °C, 6 bar pressure at valve inlet and 1 bar differential pressure
Nominal operating mode	Continuous operation (100% duty cycle)
Operating voltage	24 V DC (±10% tolerance)
Nominal power of each valve	1 W, 2 W, 3 W
Operating medium	Oil-free or lubricated compressed dry air, neutral gases (5 μm filter recommended)
Degree of protection	IP20 (IP65 in closed control cabinets or with cable plug)

Structure and Description

Structure of solenoid valve type 5470:

1. Pilot valve Type 6106
2. Exhaust port 3
3. Pressure port 1
4. Working port 4
5. Working port 2
6. Manual override
7. Cable plug Type 2506

Manual Override

To operate the valve manually, press the manual override and turn it 90° clockwise (until it stops). The manual override is locked and does not reset automatically. Only operate the manual override when the power is off.

Circuit Functions

Symbol	Description
C	3/2-way valve. In rest position, pressure port 1 (P/NC) closed, working port 2 (A/OUT) open after port 3 (R/NO).
D	3/2-way valve. In rest position, pressure port 1 (P/NO) open after working port 2 (B/OUT), port 3 (R/NC) closed.
G	4/2-way valve. In rest position, pressure port 1 (P) open after working port 2 (A), working port 4 (B) open after port 3 (R).

Conversion of 4/2 to a 3/2-way valve

To convert the 4/2-way valve to a 3/2-way valve, depending on the desired circuit function, close port 2 or port 4 with a stopper.

Port 2	Port 4	Circuit function
closed	open	C
open	closed	D

Installation

WARNING

Risk of injury due to high pressure and escaping medium. Switch off the pressure before working on the device or system. Vent or drain the pipes. Risk of injury due to electric shock. Switch off voltage before working on the device or system. Secure against reactivation.

Valve Block Installation

Standard rail installation:

1. Hook the valve block with the upper groove into the standard rail (35 x 15 or 35 x 7.5 EN 50022).
2. Snap the lower clamping pieces into the standard rail.
3. Tighten the screws on the clamping pieces.

Tightening Torques for Port Connections

Port size	Marking/function	Recommended tightening torque [Nm]	Maximum tightening torque [Nm]
G1/4	P, R/S connection	4...7	20
G1/8	P, R/S connection A/B valve outlets	3...6	7

Maintenance and Troubleshooting

Fault	Possible cause	Remedy
Valves do not switch	No operating voltage or operating voltage too low	Check electrical connection. Ensure operating voltage according to type label.
	Manual override not in zero position	Bring manual override to zero position.
	Pressure supply insufficient or not available	Set up large-volume pressure supply. Minimum operating pressure ≥ 2 bar.
Valves switch with a delay or blow off at the exhaust ports	Valves are not in the home position (de-energised) during pressure build-up	Apply pressure to the valve block before the valves are switched.
	Insufficient ventilation of the exhaust air ducts due to too small or dirty silencers	Use suitably sized silencers or expansion vessels. Clean the dirty silencers.
	Impurities or foreign matter in the pilot or pneumatic valve	Apply pulsed pressure to the exhaust air ducts to blow out the impurities. Install a new pilot or pneumatic valve.
Leaky valve blocks	Missing or crushed O-rings between the modules	Identify leak or missing seals.
	Missing or incorrectly positioned flat seals between valve and base plate	Insert missing seals or replace damaged seals.